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debloat: use __syscall instead of syscall where possible

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don't waste time (and significant code size due to function call
overhead!) setting errno when the result of a syscall does not matter
or when it can't fail.
This commit is contained in:
Rich Felker
2011-04-17 16:32:15 -04:00
parent 09dae2b7b6
commit eb0e8fa0b1
7 changed files with 8 additions and 8 deletions
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4
src/stdio/__fdopen.c
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@ -20,8 +20,8 @@ FILE *__fdopen(int fd, const char *mode)
/* Set append mode on fd if opened for append */
if (*mode == 'a') {
int flags = syscall(SYS_fcntl, fd, F_GETFL, 0);
syscall(SYS_fcntl, fd, F_SETFL, flags | O_APPEND);
int flags = __syscall(SYS_fcntl, fd, F_GETFL);
__syscall(SYS_fcntl, fd, F_SETFL, flags | O_APPEND);
}
f->fd = fd;